S-91410A956 7/8"-9 x 12" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior torque transmission with external square drive design for secure installation and removal in high-stress applications
• Exceptional material durability provided by steel construction with Rockwell B80 hardness, resisting deformation under heavy loads
• Reliable fastening performance through Class 2A thread fit ensuring consistent engagement and vibration resistance
• Quick installation advantage with coarse UNC threads that reduce assembly time in industrial settings
• Long-term corrosion resistance with cup tip design that minimizes surface damage and maintains clamping force
• Regulatory compliance assurance meeting ASME B18.6.2 specifications for dimensional accuracy and performance reliability
• Environmental safety compliance with RoHS 3 and REACH regulations for use in regulated industries

Professional Applications & Engineering Value

This 7/8"-9 UNC square head set screw delivers critical engineering solutions for heavy machinery, manufacturing equipment, and structural assemblies where vibration resistance and permanent positioning are paramount. The steel construction with Rockwell B80 hardness provides exceptional resistance to shear forces and mechanical stress, while the coarse thread spacing ensures rapid installation in time-sensitive industrial environments. The external square drive design enables high-torque application without cam-out, making it ideal for securing gears, pulleys, and collars on shafts in demanding applications. The 12-inch length accommodates deep penetration requirements, and the cup tip concentrates clamping force to prevent component slippage, addressing common industrial fastening challenges in construction, mining, and heavy equipment sectors.

Specification Summary & Compliance

This square head set screw features precise Class 2A thread fit tolerances with 7/8"-9 UNC coarse threads and right-hand thread direction. Manufacturing complies with ASME B18.6.2 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety, ensuring suitability for international industrial markets and environmentally conscious applications.